To run AutoCAD 2020.2 on a Mac, your hardware and software should meet these standards according to Autodesk Support:
Downloading compressed design suites from unofficial third-party websites or peer-to-peer networks poses significant risks. AutoCAD..2020.2.macOS.net.zip
AutoCAD 2020 was engineered prior to modern operating systems like macOS Sonoma or macOS Sequoia. Attempting to install it on a modern operating system will likely result in installation failures due to legacy security certification and deprecated framework libraries. Apple Silicon vs. Intel To run AutoCAD 2020
: Autodesk itself warns that "the people who crack software can easily insert additional code, including malware that steals your work or turns your computer into a zombie." . AutoCAD..2020.2.macOS.net.zip